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Chemistry
A Level

When vaporised, isotopes of an element can be separated in a mass spectrometer. Name the three processes that occur in a mass spectrometer before the vaporised isotopes can be detected. State how each process is achieved. (6 marks)

Once the sample is vaporised, high energy electrons are fired at the sample which knocks off a loosely held electron. (1) This step is known as election impact ionisation. (2) Due to the presence of a cha...

MF
4161 Views

How do you classify an alkene using Cahn-Ingold-prelog rules

First, look at each of the groups connected to the two carbon atoms in the double bond. Rank these groups by priority based on the atomic mass of the atom connected to the alkene carbon. If both of the he...

LM
Answered by Leon M. Chemistry tutor
2046 Views

How does the electronegativity of the halogen atom change as group 7 is descended?

Electronegativity is the measure of how strongly an atom attracts a bonding pair of electrons to itself. As group 7 is descended, the electronegativity decreases. This is because the size of the halogen a...

ST
Answered by Serene T. Chemistry tutor
15215 Views

Describe the difference in melting points for the elements Sodium and Magnesium

With these sort of questions, it's important to firstly think about what type of bonds make up the structure of the element. For this example, they both have metallic bonds which hold the structures toget...

MS
Answered by Myles S. Chemistry tutor
14996 Views

Which is more reactive, an alkane or an alkene and why?

Alkenes are more reactive due to the presence of a carbon carbon double bond (always important to state what the double bond is between or may not get the marks!). This is because the carbon carbon double...

LC
Answered by Lucy C. Chemistry tutor
31935 Views

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